Carburetor device



Feb. 13, A HYMA CARBURETOR DEVICE Filed July 16, 1932 abkoz H4434Patented Feb. 13, i934 UNITED STATES} PATENT OFFICE fourth to GeorgeYonkman, one-fourth to Charles F. Fordham, and one-fourth to Herbert F.Johnson, all of Grand Rapids, Mich.

Application July 16, 1932. Serial No. 622,847

1 Claim.

The present invention relates to carburetors for internal-combustionengines; and its object is, generally, to provide an improved device ofthat character; and more particularly, to provide an improved carburetordevice including a tank for the liquid fuel through which fuel air ispassed and the resulting fumes are drawn by the suction of the engineinto mixture with a Valvecontrolled air stream supplied to the usualcarburetor of such engine, the aforesaid mixture going to the enginebeing valve-controlled; and further, to provide such a device incombination with liquid fuel supplied to the engine in the usual manner;and further, to provide such a device which with the conduit for saidfumes may be readily applied to and connected with the usual carburetorof an automobiles internal-combustion engine; and further, to provideimproved means for passing air through the liquid fuel in the tank toprovide said fumes.

These and any other objects hereinafter appearing are attained by, andthe invention finds preferably embodiment in, the structure and devicesparticularly described in the body of this specification and illustratedby the accompanying drawing, in which:

Figure 1 is a combined and somewhat diagrammatic view of a carburetor ofusual type for the internal-combustion engine of an automobile or thelike, and my carburetor device applied thereto, shown partly in section;

Figure 2 is a vertical sectional view (much enlarged) of a portion ofthe fuel-containing tank and the air conduit therein;

Figure 3 is a horizontal sectional View of said conduit taken on line 33of Figure 2;

Figure 4 is a horizontal sectional view thereof taken on line 4-4 ofFigure 2.

In the drawing is illustrated a carburetor 1, of usual type, for theinternal-combustion engine of an automobile or the like, having a pipe 2for conveying liquid fuel 3 from the bottom of the fuel tank 4, andhaving also the air inlet 5 governed by a suitable choke valve 6, andalso having the outlet 7 for said fuel and air as mixed in thecarburetor in the usual manner, said outlet leading to the engine or itsmanifold (not shown) and being controlled by the accelerator valve 8.

My carburetor device, associated with the said carburetor of usual type,comprises means for passing air upwardly through the liquid fuel 3 inthe tank 4 to vaporize the same and provide fumes 9 thereof in the tankand above the level of the liquid fuel therein. A tube or conduit 10extends from the interior of this tank, and above said fuel level, intothe said usual carburetor, so that these fumes are drawn through saidconduit and into the mixed liquid fuel drawn through pipe 2 and the airdrawn through the intake 5.

The combined mixture of liquid fuel received through pipe 2, air throughintake 5, and fuel fumes through conduit 10, pass through outlet 7,which is controlled by valve 8, and into the engine or its manifold (notshown) beingdrawn thereinto by the suction of the engine.

The means for passing air through the liquid fuel in the tank desirablecomprises a vertical tubular member having a cap or body 11 screwed intoa hollow internally threaded member 12 on the top of the tank, said capor body having an air passage 13 therethrough controlled by a threadedconical valve 14 having a jam nut 15. A tube 16 extends downwardly intothe liquid fuel 3 and has at its lower end a collar portion 17 with anannular rib 18 and. an enlarged hollow discharge member 19 of sheetmetal crimped at its upper edge around the rib 18 and having a series ofcircularly arranged venting orifices 20. The air entering the passage 13is drawn down through the cap or body 11, the tube 16 and the dischargemember 19 and out through the orifices 20, whence it rises or bubbles upthrough the liquid fuel, vaporizing the same and creating the fuel fumes9 above its level.

My device as above described is particularly well adaptedfor use withthe usual liquid hydrocarbon fuel, such as gasolene.

It will be seen that the valves 6 and 8 may be so turned as to providethe desired combination of liquid fuel, air, and said fuel fumes createdby the passing of air through the liquid fuel. At times, as in startingthe engine, the air inlet valve 6 may be closed or nearly closed, sothat a rich combustible fuel mixture is furnished to the engine.

My carburetor device may be used with other than liquid hydrocarbonfuel, as with oil fuel contained in the tank 4 through which oil air ispassed as above described to create similar fumes above the oil levelwhich are then drawn off through the conduit 10 to the engine. In suchuse, the usual carburetor 1 may in some cases be dispensed with.

It will be seen that my carburetor device may be applied tointernal-combustion engines having the usual carburetor 1, liquid fueltank 4, liquid fuel pipe 2, air intake 5 and outlet 7, with the usualvalves 6 and 8, and as an additional or accessory carburetor device ,bymerely providing said fuel tank with the tubular member or air conduit16, etc. described, and the said conduit 10 for the fumes 9 leading fromthe tank to the usual carburetor 1 below the valve 8.

The invention being intended to be pointed out in the claim, is not tobe limited to or by details of construction of any particular embodimentthereof illustrated by the drawing or hereinbefore described.

I claim:

In a carburetor device of the character described for aninternal-combustion engine: a liquid fuel tank; means for drawing airthrough the liquid fuel in said tank by the suction of the engine tocreate combustible fumes above the liquid level in the tank, said meansincluding a cap threaded through the top of the tank having an airpassage therethrough controlled by a threaded conical valve, acommunicating air tube extending downwardly into the liquid fuel andhaving at its lower end an annular rib, and a hollow discharge membercrimped over said rib and having a plurality of circularly arranged airvents; a conduit leading from said tank to the engine for drawing saidfumes from above said liquid level in the tank to the engine by thesuction of the engine.

ABE I-IYMA.

Ill)

